KR20220107292A - Two-way pressure relief valves, cells and electrical devices - Google Patents

Abstract

A bidirectional pressure relief valve (20), a cell (10) and an electrical device are disclosed. The bidirectional pressure relief valve 20 includes a valve seat 30 , a first valve core 40 , and a second valve core 50 . The valve seat 30 has opposing first and second ends 31 and 32 , a channel 33 and a separator 34 . The channel 33 passes through the first end 31 and the second end 32 . A first pressure relief hole 341 is installed in the separator 34 . The separator 34 is installed on the inner wall of the channel 33 . In the axial direction X of the channel 33 , the separator 34 divides the channel 33 into a first chamber 331 and a second chamber 332 . At least a portion of the first valve core 40 is installed in the first chamber 331 and is configured to open or close the first pressure relief hole 341 , so that the first chamber 331 and the second chamber 332 are separated. connect or block. At least a portion of the second valve core 50 is located in the second chamber 332 and is configured to open or close the second pressure relief hole 60 , thereby communicating the first chamber 331 and the second chamber 332 . make or block Here, the second pressure relief hole 60 is installed in the separator 34 or the first valve core 40 .

Description

Two-way pressure relief valves, cells and electrical devices

This application claims priority to Chinese Patent Application 202010898974.1, filed on August 31, 2020, entitled "Two-Way Pressure Relief Valve, Battery and Electrical Apparatus", the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD This application relates to the field of battery technology, and more particularly to bidirectional pressure relief valves, batteries and electrical devices.

With the development of science and technology, the field of use of the rechargeable battery is getting wider and wider, and for example, the battery can be used in a car or an electric bicycle. The battery generally adopts sealing design to increase the reliability of the battery and meet the basic waterproof and dustproof requirements. In a situation in which the battery is heated during use of the battery or the battery fails due to a change in altitude, the safety of the battery may be affected.

It causes a situation where the internal pressure and the external pressure of the battery are different. However, if the air pressure inside the battery is too high or too low, the sealing surface structure is easily damaged, resulting in battery failure.

Provided herein are bidirectional pressure relief valves, cells and electrical devices. A two-way pressure relief valve can be applied to the cell to balance the internal and external pressures of the cell.

In one aspect, the present application proposes a bidirectional pressure relief valve, wherein the bidirectional pressure relief valve includes a valve seat, a first valve core, and a second valve core. The valve seat has opposing first and second ends, a channel and a separator. The channel passes through the first end and the second end. A first pressure relief hole is installed in the separator. The separator is installed on the inner wall of the channel. In the axial direction of the channel, the separator divides the channel into a first chamber and a second chamber. At least a portion of the first valve core is located in the first chamber and is configured to open or close the first pressure relief hole to communicate or block the first chamber and the second chamber. At least a portion of the second valve core is located in the second chamber, and is configured to open or close the second pressure relief hole to communicate or block the first chamber and the second chamber. Here, the second pressure relief hole is installed in the separator or the first valve core.

According to an embodiment of an aspect of the present application, the separator includes a first region and a second region, a first pressure relief hole is provided in the first region, and the second pressure relief hole is a second region of the separator. installed in the area.

According to one aspect of the present disclosure, the first region is provided while surrounding the second region, or along a radial direction of the channel, the first region is located at one side of the second region.

According to an embodiment of an aspect of the present application, a first through-hole is installed in the first valve core, the first through-hole is configured to communicate with the first chamber and the second pressure relief hole, and/or the second valve core is provided with a second through-hole, and the second through-hole is configured to communicate with the second chamber and the first pressure relief hole.

According to an embodiment of an aspect of the present application, the second pressure relief hole is provided in the first valve core and corresponds to the position of the first pressure relief hole, the second valve core is provided with a protrusion, and at least a portion of the protrusion is provided. It is accommodated in the first pressure relief hole and is configured to contact or separate from the first valve core, thereby closing or opening the second pressure relief hole.

According to an exemplary embodiment of the present application, a second through-hole is installed in the second valve core, and the second through-hole is configured to communicate with the second chamber and the first pressure relief hole.

According to an embodiment of one aspect of the present application, along the axial direction of the channel, the orthographic projection of the first valve core covers the first pressure relief hole, and the orthographic projection of the second valve core covers the second pressure relief hole. .

According to an embodiment of an aspect of the present application, the first valve core includes a first elastic member and a first valve body, the first elastic member is in contact with and pressurizes the first valve body, and the first valve body is a first configured to open or close the pressure relief hole.

According to an embodiment of an aspect of the present application, the first valve body includes a first valve plate and a first sealing pad, and at least a portion of the first valve plate is located between the first elastic member and the first sealing pad, The first valve body opens or closes the first pressure relief hole through the first sealing pad.

According to one aspect of the present application, a first groove is provided on a surface of the first valve plate away from the first elastic member, and at least a portion of the first sealing pad is accommodated in the first groove.

According to one embodiment of the present application, the second valve core includes a second elastic member and a second valve body, the second elastic member is in contact with and pressurizes the second valve body, and the second valve body is a second valve body. 2 is configured to open or close the pressure relief hole.

According to an embodiment of an aspect of the present application, the second valve body includes a second valve plate and a second sealing pad, and at least a portion of the second valve plate is located between the second elastic member and the second sealing pad, The second valve body opens or closes the second pressure relief hole through the second sealing pad.

According to one aspect of the present application, the surface of the second valve plate away from the second elastic member has a second groove, and at least a portion of the second sealing pad is accommodated in the second groove.

According to an embodiment of an aspect of the present application, the bidirectional pressure relief valve further includes an end cover having a through hole, the end cover is installed at the first end, the through hole is in communication with the first chamber, and the end cover is the first The first valve core is confined in the first chamber, and/or an end cover is installed at the second end, the through hole communicates with the second chamber, and the end cover restricts the second valve core in the second chamber.

According to an embodiment of one aspect of the present application, the bidirectional pressure relief valve further includes a semipermeable membrane and a protective cover, the semipermeable membrane is positioned in the through hole to cover the through hole, and the protective cover is connected to the end cover and covers the opening of the through hole. The protective cover and the semi-permeable membrane are installed spaced apart.

The bidirectional pressure relief valve according to the embodiment of the present application may implement opening in both directions, and is normally closed. The first valve core and the second valve core are installed axially along the channel of the valve seat, and both are used together with the valve seat to realize the opening or closing of the bidirectional pressure relief valve, so that the radial direction of the channel and the axial direction of the channel Make the size and structure of the valve seat more compact. The two-way pressure relief valve is automatically selected to open the first valve core or the second valve core according to the pressure change on both sides, so that the pressure on both sides can automatically reach equilibrium. The radial direction of the channel indicates a direction perpendicular to the axial direction of the channel. After the bidirectional pressure relief valve of the embodiment of the present application is applied to the battery, when the air pressure inside the battery is too high or too low, the bidirectional pressure relief valve automatically opens and opens, and switches from the normally closed state to the open state, so that the internal pressure of the battery and external pressure gradually equalize. After the cell's internal pressure and external pressure are balanced, the two-way pressure relief valve automatically closes and shuts off, transitioning from the open state to the conducting state, thereby preventing external gas or water vapor from entering the cell interior. In this way, when the air pressure inside the battery is too high or too low, the possibility of structural damage to the sealing surface due to deformation of the housing is reduced, thereby reducing the possibility of external water vapor or dust flowing into the battery and causing battery failure. In an aspect, the present application provides a cell, wherein the cell includes a housing, a cell module, and a bidirectional pressure relief valve. The housing has an accommodation space. The battery module is accommodated in the accommodation space. A two-way pressure relief valve is installed in the housing. The two-way pressure relief valve is configured to maintain the pressure equilibrium of the receiving space so that the receiving space maintains a preset pressure value.

According to another aspect of the present disclosure, the battery further includes an annular sealing member, the annular sealing member is installed overlaid on the outside of the valve seat, and the annular sealing member is configured to seal the valve seat and the housing.

In another aspect, according to the present application, there is provided an electric device including the battery of the above-described embodiment.

Hereinafter, in order to more clearly describe the technical solutions of the embodiments of the present application, the accompanying drawings used in the embodiments of the present invention will be briefly introduced below. The drawings described below are only some embodiments of the present application, and those skilled in the art may obtain other drawings according to the drawings without creative efforts.
1 is a partial structural schematic diagram of a vehicle disclosed by an embodiment of the present application.
2 is a structural schematic diagram of a battery disclosed by an embodiment of the present application.
3 is a structural schematic diagram of a bidirectional pressure relief valve disclosed by an embodiment of the present application.
4 is an exploded structural schematic diagram of the bidirectional pressure relief valve of the embodiment shown in FIG. 3 .
FIG. 5 is a schematic diagram of a half-sectional structure of the bidirectional pressure relief valve of the embodiment shown in FIG. 3 .
6 is a schematic structural plan view of a valve seat disclosed by an embodiment of the present application.
7 is a schematic diagram of a half-sectional structure of a bidirectional pressure relief valve disclosed by another embodiment of the present application.
8 is a schematic diagram of a half-sectional structure of a bidirectional pressure relief valve disclosed by another embodiment of the present application.
9 is a schematic structural plan view of a valve seat disclosed by another embodiment of the present application.
10 is a schematic half-sectional structural view of a bidirectional pressure relief valve disclosed by another embodiment of the present application.
11 is a schematic diagram of a second valve core structure disclosed in an embodiment of the present application.
12 is a structural cross-sectional schematic view of a state in which the bidirectional pressure relief valve and the housing disclosed in an embodiment of the present application are connected.
In the accompanying drawings, the drawings are not drawn to scale.

The present application will be described in more detail in conjunction with the drawings and examples below. The detailed description and drawings of the following examples are used to illustrate the principles of the present application and should not be used to limit the scope of the present application. That is, the present application is not limited to the described embodiments.

In the description of the present application, it is necessary to explain that, unless otherwise specified, the meaning of "plurality" is two or more, and the terms "top", "bottom", "left", "right", "inside" or "outside", etc. The positional relationship indicated by is not to indicate or imply that the mentioned device or element must have a specific orientation, and to be constructed and operated in a specific orientation, but is intended to easily explain and briefly describe the present application, and thus be understood as a limitation on the present application. shouldn't Also, the terms "first", "second", etc. are used for the purpose of description only and should not be construed as indicating or implying relative importance. "Perpendicular" is not strictly perpendicular, but within an acceptable error range. "Parallel" is not strictly parallel, but within an acceptable error range.

Directional words mentioned in the following description are all directions shown in the drawings, and are not intended to limit the specific structure of the embodiments of the present application. In the description herein, the terms “mounted”, “connected to each other”, “connected” are to be understood in a broad sense unless explicitly specified and limited otherwise, and may be, for example, a fixed connection, and a detachable connection. may be, or may be integrally connected, may be directly connected to each other, or may be indirectly connected to each other through an intermediate medium. For those skilled in the art, specific meanings of the terms in the present application may be understood according to specific circumstances. After recognizing that the conventional battery has a problem in that a failure occurs due to unstable pressure, various structures of the battery research and analysis were performed on Applicants have discovered that, in the course of using the battery, the battery is radiated heat or the sea level changes, resulting in a situation in which the internal and external pressures of the battery are different. However, if the air pressure inside the battery is too high or too low, it is easy to damage the sealing surface structure, and this causes external water vapor or dust to flow into the battery and cause battery failure.

In view of the above problems discovered by the applicant, the applicant has improved the structure of the battery, and embodiments of the present application will be further described below.

Hereinafter, in order to better understand the present application, an embodiment of the present application will be described with reference to FIGS. 1 to 12 .

The embodiment of the present application provides an electric device using the battery 10 as a power source. The electrical device may be, but is not limited to, a vehicle, a ship, or an aircraft. Referring to FIG. 1 , an embodiment of the present disclosure provides a vehicle 1 . The vehicle 1 may be a fuel oil vehicle, a natural gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended mileage vehicle. In an embodiment of the present disclosure, the vehicle 1 may include a motor 1a , a controller 1b , and a battery 10 . The controller 1b is used to control the battery 10 to supply power to the motor 1a. The motor 1a is connected to the wheel through a driving mechanism, and drives the running of the vehicle 1 . The cell 10 can be used as a driving power source of the vehicle 1 to provide a driving force to the vehicle 1 in place of or partially in place of fuel oil or natural gas. In one example, the battery 10 may be installed at the bottom, front, or rear of the vehicle 1 . The battery 10 can be used to power the vehicle 1 . In one example, the battery 10 may be used in an electrical system of the vehicle 1 as an operating power source of the vehicle 1 . Optionally, the battery 10 may be used for operating power demand for starting, navigation and driving of the vehicle 1 .

Referring to FIG. 2 , the battery 10 may include two or more battery modules (not shown). In some alternative embodiments, the cell 10 further includes a housing 11 . The housing 11 has an accommodation space. Two or more battery modules are arranged in an accommodating space of the housing 11 . The type of the housing 11 is not limited. The housing 11 may be a frame-shaped housing, a disk-shaped housing, or a box-shaped housing. Optionally, the housing 11 includes an upper housing 111 and a lower housing 112 cover-integrated to the upper housing 111 . The upper housing 111 and the lower housing 112 form an accommodating space for accommodating the battery module after the cover is combined. In some other embodiments, the battery 10 includes a housing 11 and a plurality of battery cells installed directly within the housing 11 . In some other embodiments, the battery 10 may further include one battery module.

Cell 10 also includes a bidirectional pressure relief valve 20 mounted on housing 11 . The number of bidirectional pressure relief valves 20 may be one or two or more. The bidirectional pressure relief valve 20 is used to balance the pressure of the receiving space and the external environment, so that the receiving space maintains a preset pressure value.

3 and 4 together, the bidirectional pressure relief valve 20 includes a valve seat 30 , a first valve core 40 , and a second valve core 50 . The valve seat 30 has opposing first and second ends 31 and 32 and channels 33 passing through the first and second ends 31 and 32 . The gas may flow in the channel 33 of the valve seat 30 and pass through the valve seat 30 . The bidirectional pressure relief valve 20 further includes a first valve core 40 and a second valve core 50 . The first valve core 40 and the second valve core 50 are disposed in the channel 33 .

Referring to FIG. 5 , the bidirectional pressure relief valve 20 further includes a separator 34 . The separator 34 is installed in the channel 33 of the valve seat 30 and is connected to the inner wall of the channel 33 . In the axial direction X of the channel 33 , the separator 34 divides the channel 33 into a first chamber 331 and a second chamber 332 . The first valve core 40 is disposed in the first chamber 331 , and the second valve core 50 is disposed in the second chamber 332 . The separator 34 has a first pressure relief hole 341 and a second pressure relief hole 60 . The first valve core 40 is configured to open or close the first pressure relief hole 341 to communicate or block the first chamber 331 and the second chamber 332 . The second valve core 50 is configured to open or close the second pressure relief hole 60 to communicate or block the first chamber 331 and the second chamber 332 . Optionally, the valve seat 30 has a cylindrical structure.

5 , when the W-side pressure value of the bidirectional pressure relief valve 20 is greater than the N-side pressure value, the first valve core 40 is moved away from the separator 34 to relieve the first pressure The hole 341 is opened, and at this time, the first chamber 331 and the second chamber 332 communicate through the first pressure relief hole 341, so that the pressure of the W side and the N side is gradually balanced. . After the W-side and N-side pressures are balanced, the first valve core 40 moves toward the separator 34 to close the first pressure relief hole 341 , and at this time, the first chamber 331 . and the second chamber 332 are blocked from each other, so that external gas or water vapor cannot move from the W side to the N side through the bidirectional pressure relief valve 20 . When the first valve core 40 is operated, the second valve core 50 maintains sealing contact with the separator 34 , so that the second valve core 50 closes the second pressure relief hole 60 . make it state When the N-side pressure value of the bidirectional pressure relief valve 20 is greater than the W-side pressure value, the second valve core 50 is moved away from the separator 34 to open the second pressure relief hole. At this time, the first chamber 331 and the second chamber 332 are communicated through the second pressure relief hole 60, so that the pressure of the N side and the W side is gradually balanced. After the W-side and N-side pressures are balanced, the second valve core 50 moves toward the separator 34 to close the second pressure relief hole 60 , and at this time, the first chamber 331 . and the second chamber 332 are blocked from each other. During the operation of the second valve core 50 , the first valve core 40 maintains sealing contact with the separator 34 , so that the first valve core 40 closes the first pressure relief hole 341 . to be in one state.

The bidirectional pressure relief valve 20 of the embodiment of the present application may implement opening in both directions, and is normally in a normally closed state. The first valve core 40 and the second valve core 50 are disposed along the axial direction X of the channel 33 , and both are used together with the valve seat 30 to prevent By implementing opening or closing, the size and structure of the valve seat 30 in the radial direction of the channel 33 and the axial direction X of the channel 33 are compact. The bidirectional pressure relief valve 20 may automatically select to open the first valve core 40 or the second valve core 50 according to the pressure change on both sides, so that the pressures on both sides are automatically balanced. The radial direction of the channel 33 means a direction perpendicular to the axial direction X of the channel 33 . After the bidirectional pressure relief valve 20 of the present embodiment is applied to the cell, if the air pressure inside the cell is too high or too low, the bidirectional pressure relief valve 20 automatically opens and opens, and in the normally closed state It is switched to an open state, allowing the internal and external pressures of the cell to gradually equalize. When the internal pressure and the external pressure of the battery reach equilibrium, the bidirectional pressure relief valve 20 automatically closes and shuts off, changing from an open state to a closed state, thereby preventing external gas or water vapor from entering the interior of the battery. As such, when the air pressure inside the battery is too high or too low, the housing 11 is deformed to reduce the possibility that the sealing surface is structurally damaged, and external water vapor or dust flows into the battery, causing battery failure. reduce the likelihood

In some other embodiments, as shown in FIG. 5 , the orthographic projection of the first valve core 40 along the axial direction X of the channel 33 covers at least the first pressure relief hole 341 . and the orthographic projection of the second valve core 50 may cover at least the second pressure relief hole 60. When a pressure difference exists on the W side or the N side of the bidirectional pressure relief valve 20, The first valve core 40 or the second valve core 50 may move along the axial direction (X) to open or close the first pressure relief hole 341 or the second pressure relief hole 60 . The orthographic projection of the first valve core 40 does not cover the second pressure relief hole 60 , which may adversely affect the gas passability of the first valve core 40 to the second pressure relief hole 60 . The orthographic projection of the second valve core 50 does not cover the first pressure relief hole 341 , which means that the second valve core 50 has the ability to pass gas through the first pressure relief hole 341 . Optionally, the first valve core 40 and the second valve core 50 are arranged along the axial direction X of the channel 33 .

In some other embodiments, as shown in FIG. 5 , the first valve core 40 includes a first elastic member 41 and a first valve body 42 . The first elastic member 41 is pressed against the first valve body 42 . The first valve body 42 is configured to open or close the first pressure relief hole 341 . The first elastic member 41 is installed on one side of the first valve body 42 away from the separator 34 . The first elastic member 41 is limited in the first chamber 331 . The first elastic member 41 applies a predetermined compressive stress to the first valve body 42 by its own elastic restoring force, and presses the first valve body 42 to the separator 34, whereby the first The valve body 42 and the first pressure relief hole 341 maintain good sealing properties. When the W-side pressure is greater than the N-side pressure, the gas pressure acts on the first valve body 42 to move the first valve body 42 away from the separator 34 . The first valve body 42 compresses the first elastic member 41 and opens the first pressure relief hole 341 . When the W-side and N-side pressures reach equilibrium, the first elastic member 41 moves closer to the separator 34 along the X-axis of the channel 33 under the action of its own elastic restoring force. 42), and finally closes the first pressure relief hole 341. In the radial direction of the channel 33 , the first valve body 42 may be position-limited by the inner wall of the channel 33 , such that when the first valve body 42 moves within the channel 33 , the first valve body 42 . Improves the stability of (42), reduces the possibility that the first valve body 42 collides with the inner wall of the channel 33 or the inner wall is scratched due to fluctuations appearing in the course of movement, and Due to the fluctuations appearing during movement, it becomes impossible to move while being caught in the valve seat 30 , thereby reducing the possibility that the bidirectional pressure relief valve 20 cannot be used normally. Optionally, the first valve body 42 directly contacts the inner wall of the channel 33 . Optionally, the first elastic member 41 is a coil spring. Alternatively, the first elastic member 41 is an elastic sleeve.

In some other embodiments, the first valve body 42 includes a first valve plate 421 and a first sealing pad 422 . At least a portion of the first valve plate 421 is positioned between the first elastic member 41 and the first sealing pad 422 . The first valve body 42 opens or closes the first pressure relief hole 341 through the first sealing pad 422 . The first valve plate 421 and the first sealing pad 422 are disposed along the axial direction X of the channel 33 . The first elastic member 41 contacts and presses the first valve plate 421 , and applies a compressive stress to the first sealing pad 422 through the first valve plate 421 . Since the rigidity of the first valve plate 421 is stronger than that of the first sealing sealing pad 422 , the first valve plate 421 is not easily deformed compared to the first sealing sealing pad 422 . 422 is easily pushed upward, reducing the possibility of accidentally opening the first pressure relief hole 341 , thereby improving the working stability and reliability of the bidirectional pressure relief valve 20 . In addition, the first elastic member 41 does not directly contact the first sealing pad 422 , which is due to the first elastic member 41 applying a long-term compressive stress to the first sealing pad 422 . It is possible to reduce the possibility that a sealing defect appears in the first sealing pad 422 by causing a defect in elastic restoring force or structural damage of the sealing pad 422 . Optionally, the material of the first valve plate 421 is plastic, and the material of the first sealing pad 422 is rubber or silicone gel.

In some other embodiments, as shown in FIG. 5 , a surface away from the first elastic member 41 of the first valve plate 421 has a first groove 421a. At least a portion of the first sealing pad 422 is accommodated in the first groove 421a. The first valve plate 421 may form protection and position restrictions for the first sealing pad 422 , thereby reducing the possibility that the first sealing pad 422 is worn or misaligned, resulting in poor sealing effect or invalidity. can

In some other embodiments, as shown in FIG. 5 , the bidirectional pressure relief valve 20 includes an end cover 70 . The end cover 70 has a through hole 70a. An end cover 70 is installed at the first end 31 . Optionally, the first end 31 and the end cover 70 are detachably connected. For example, the end cover 70 may be screwed or adhered to the first end 31 . The through hole 70a of the end cover 70 communicates with the first chamber 331 . The end cover 70 limits the first valve core 40 in the first chamber 331 .

Optionally, after sequentially inserting the first valve body 42 and the first elastic member 41 of the first valve core 40 into the first chamber 331 , the end cover 70 is attached to the first end 31 . ) by mounting the end cover 70 to form a position limit with respect to the first elastic member 41 to compress the first elastic member (41). By adjusting the position of the end cover 70 , the amount of compression of the first elastic member 41 may be adjusted, and the preset opening pressure value of the first valve core 40 may be adjusted according to demand.

In some other embodiments, as shown in FIG. 5 , the second valve core 50 includes a second elastic member 51 and a second valve body 52 . The second elastic member 51 is pressed against the second valve body 52 . The second valve body 52 is configured to open or close the second pressure relief hole 60 . The second elastic member 51 is installed on one side of the second valve body 52 away from the separator 34 . The second elastic member 51 is limited in the second chamber 332 . The second elastic member 51 applies a predetermined compressive stress to the second valve body 52 by its own elastic restoring force, so that the second valve body 52 seals the second pressure relief hole 60 . can guarantee When the N-side pressure is greater than the W-side pressure, the gas pressure acts on the second valve body 52 to push the second valve body 52 away from the separator 34 . The second valve body 52 opens the second pressure relief hole 60 by compressing the second elastic member 51 . When the W-side and N-side pressures reach equilibrium, the second valve body 51 moves closer to the separator 34 along the X-axis of the channel 33 under the action of its own elastic restoring force. 52), and finally closes the second pressure relief hole (60). In the radial direction of the channel 33 , the second valve body 52 can be position-limited by the inner wall of the channel 33 , thereby improving the stability when the second valve body 52 moves within the channel 33 . and reduces the possibility of bumping or scratching the inner wall of the channel 33 due to the fluctuations appearing in the movement process of the second valve body 52, and also due to the fluctuations that appear in the movement process of the second valve body 52 It becomes stuck in the valve seat 30 and cannot move, reducing the possibility that the bidirectional pressure relief valve 20 cannot be used normally. Optionally, the second valve body 52 directly contacts the inner wall of the channel 33 . Optionally, the second elastic member 51 is a coil spring. Optionally, the second elastic member 51 is an elastic sleeve.

In some other embodiments, the second valve body 52 includes a second valve plate 521 and a second sealing pad 522 . At least a portion of the second valve plate 521 is positioned between the second elastic member 51 and the second sealing pad 522 . The second valve body 52 opens or closes the second pressure relief hole 60 through the second sealing pad 522 . The second valve plate 521 and the second sealing pad 522 are disposed along the axial direction X of the channel 33 . The second elastic member 51 contacts and presses the second valve plate 521 , and applies a compressive stress to the second sealing pad 522 through the second valve plate 521 . Since the rigidity of the second valve plate 521 is stronger than that of the second sealing pad 522 , the second valve plate 521 is not easily deformed compared to the second sealing pad 522 . 522 is easily pushed upward, reducing the possibility of accidentally opening the second pressure relief hole 60 , thereby improving the working stability and reliability of the bidirectional pressure relief valve 20 . In addition, the second elastic member 51 does not directly contact the second sealing pad 522 , which is due to the second elastic member 51 applying a long-term compressive stress to the second sealing pad 522 . It reduces the possibility that a sealing defect appears in the first sealing pad 422 by causing a defect in the elastic restoring force or structural damage of the sealing pad 522 . Optionally, the material of the second valve plate 521 is plastic, and the material of the second sealing pad 522 is rubber or silicone gel.

In some other embodiments, as shown in FIG. 5 , a surface away from the second elastic member 51 of the second valve plate 521 has a second groove 521a. At least a portion of the second sealing pad 522 is accommodated in the second groove 521a. The second valve plate 521 forms protection and position restrictions for the second sealing pad 522, thereby reducing the possibility that the second sealing pad 522 is worn or out of position, resulting in a poor sealing effect or invalidity. .

In some other embodiments, as shown in FIG. 5 , an end cover 70 ′ is installed at the second end 32 . Here, the marking method of the end cover 70 and the end cover 70' is only for convenience of description, and does not limit the actual structure of each. Optionally, the second end 32 and the end cover 70' are detachably connected. For example, the end cover 70 ′ may be screwed or adhered to the second end 32 . The through hole (70'a) of the end cover (70') communicates with the second chamber (332). The end cover 70 ′ limits the second valve core 50 in the second chamber 332 .

Optionally, after sequentially inserting the second valve body 52 and the second elastic member 51 of the second valve core 50 into the second chamber 332 , the end cover 70 ′ is attached to the second end 32 . ), the end cover 70 ′ forms a position limit with respect to the second elastic member 51 to compress the second elastic member 51 . By adjusting the position of the end cover 70 ′, the compression amount of the second elastic member 51 can be adjusted, and the preset opening pressure value of the second valve core 50 can be adjusted according to demand.

In some other embodiments, both the first end 31 and the second end 32 of the valve seat 30 are provided with an end cover 70 or an end cover 70 ′. The bidirectional pressure relief valve 20 may be connected to the housing 11 through either the end cover 70 or the end cover 70'. Optionally, the end cover 70 and the housing 11 or the end cover 70 ′ and the housing 11 are detachably connected. For example, the end cover 70 and the housing 11 or the end cover 70 ′ and the housing 11 are fixed by screw coupling.

In some other embodiments, as shown in FIG. 5 , the bidirectional pressure relief valve 20 further includes a semi-permeable membrane 80 and a protective cover 90 . The semipermeable membrane 80 is located in the through hole 70'a and covers the through hole 70'a of the end cover 70'. The semipermeable membrane 80 can filter dust and liquid water, thereby reducing the possibility that external water vapor or dust flows into the battery and causes battery failure. The protective cover 90 is connected to the end cover 70' and covers the opening of the through hole 70'a. Optionally, the protective cover 90 is detachably connected to the end cover 70'. For example, the protective cover 90 may be screwed or bonded to the end cover 70'. The protective cover 90 is installed to be spaced apart from the semi-permeable membrane 80 to form a cavity between the two. The protective cover 90 can form protection for the semi-permeable membrane 80, and an external object collides with the semi-permeable membrane 80 or scratches the semi-permeable membrane 80, thereby reducing the possibility of causing damage to the semi-permeable membrane 80 have. Optionally, the notch 100 is installed in a position close to the protective cover 90 in the end cover 70'. The cavity between the protective cover 90 and the semipermeable membrane 80 communicates with the external environment through the notch 100 , so that gas may enter the cavity through the notch 100 . Although the structure of the end cover 70 and the end cover 70' shown in FIG. 5 are different, it should be understood that the structures of the end cover 70 and the end cover 70' may be the same in some other embodiments. do.

In some other embodiments, as shown in FIG. 5 , the first through hole 40a is installed at a position corresponding to the second pressure relief hole 60 in the first valve core 40 . The first through hole 40a is configured to communicate with the first chamber 331 and the second pressure relief hole 60 . Optionally, the diameters of the first through hole 40a and the second pressure relief hole 60 are the same. When the first valve core 40 opens the first pressure relief hole 341 , the W side gas is released from the notch 100 of the end cover 70 , the semipermeable membrane 80 , the second chamber 332 , and the first It may flow to the N side through the pressure relief hole 341 , the first through hole 40a and the first chamber 331 . When the second valve core 50 opens the second pressure relief hole 60 , the N-side gas flows into the first chamber 331 , the first through hole 40a , the second pressure relief hole 60 , and the second pressure relief hole 60 . It can flow to the W side through the notch 100 of the second chamber 332 , the semipermeable membrane 80 , and the end cover 70 .

In some other embodiments, as shown in FIG. 6 , the separator 34 has a first region 34a and a second region 34b. The first pressure relief hole 341 is installed in the first region 34a , and the second pressure relief hole 60 is installed in the second region 34b of the separator 34 . For convenience of explanation, although the first region 34a and the second region 34b are indicated by dotted lines in FIG. 6 , the dotted lines do not indicate the actual physical structure of the first region 34a and the second region 34b. ) does not limit the size of the area. In this embodiment, the first region 34a is provided to surround the second region 34b.

In some other embodiments, the second pressure relief hole 60 is located in the central region of the separator 34 . The two or more first pressure relief holes 341 surround the second pressure relief holes 60 and are installed to be spaced apart. Optionally, two or more first pressure relief holes 341 are uniformly distributed while enclosing the second pressure relief holes 60, ensuring that the first valve core 40 achieves a balance of forces received as a whole, Movement stability of the first valve core 40 in the first chamber 331 is improved. Optionally, the first pressure relief hole 341 is an arc-shaped hole.

In some other embodiments, as shown in FIG. 7 , in this embodiment, the same points as in any of the above-described embodiments will not be repeatedly described herein, but differences will be mainly described. The first valve body 42 and the second valve body 52 are integrally molded. Since the first valve body 42 and the second valve body 52 each contain a small number of parts, the processing difficulty of the first valve body 42 and the second valve body 52 is reduced, and the first valve body ( 42) and the second valve body 42 are advantageous in improving reliability and assembly easiness in the process of use. Optionally, both the material of the first valve body 42 and the material of the second valve body 52 may be plastic. It may be understood that the first valve body 42 is integrally molded, and the second valve body 52 includes a second valve plate 521 and a second sealing pad 522 . Alternatively, the second valve body 52 is integrally molded, and the first valve body 42 includes a first valve plate 421 and a first sealing pad 422 .

In some other embodiments, referring to FIGS. 8 and 9 , in this embodiment, the same points as in any of the above-described embodiments will not be repeatedly described herein, but differences will be mainly described. Referring to FIG. 8 , the first pressure relief hole 341 and the second pressure relief hole 60 are installed to be spaced apart from each other in the radial direction of the channel 33 . A second through hole 50a is installed in the second valve core 50 to correspond to the first pressure relief hole 341 . The second through hole 50a is configured to communicate with the second chamber 332 and the first pressure relief hole 341 . Optionally, the second through hole 50a has the same diameter as the first pressure relief hole 341 . When the first valve core 40 opens the first pressure relief hole 341 , the W side gas flows into the end cover 70 , the semipermeable membrane 80 , the second chamber 332 , and the second through hole 50a , through the first pressure relief hole 341 , the first through hole 40a , and the first chamber 331 may flow toward the N side. When the second valve core 50 opens the second pressure relief hole 60 , the N-side gas flows into the first chamber 331 , the first through hole 40a , the second pressure relief hole 60 , and the second pressure relief hole 60 . The second chamber 332 , the second through hole 50a , the semipermeable membrane 80 , and the notch 100 of the end cover 70 may flow to the W side. For convenience of explanation, in FIG. 9 , the first region 34a and the second region 34b are indicated by dotted lines, but the dotted lines do not indicate a physical actual structure, and the first region 34a and the second region 34b are not shown. does not limit the size of the area of In the present embodiment, along the radial direction of the channel 33 , the first region 34a is located on one side of the second region 34b . The number of the first pressure relief holes 341 installed in the first region 34a may be one or two or more. The number of the second pressure relief holes 60 installed in the second region 34b may be one or two or more.

In some other embodiments, as shown in Fig. 10, in this embodiment, the same points as in any of the above-described embodiments will not be repeatedly described herein, but differences will be mainly described. The separator 34 has a first pressure relief hole 341 . A second pressure relief hole 60 is installed in the first valve core 40 . In the axial direction X of the channel 33 , the positions of the first pressure relief hole 341 and the second pressure relief hole 60 correspond to each other. Referring to FIG. 11 , a protrusion 50a is installed on the second valve core 50 . At least a portion of the protrusion 50a is accommodated in the first pressure relief hole 341 , and is configured to contact or separate from the first valve core 40 , and the second pressure relief hole 60 on the first valve core 40 . ) to close or open. In some other embodiments, the second valve core 50 includes a second elastic member 51 and a second valve body 52 . The protrusion 50a is installed on the second valve body 52 . A second through hole 50a is installed in the second valve core 50 to correspond to the first pressure relief hole 341 . The second through hole 50a is configured to communicate with the second chamber 332 and the first pressure relief hole 341 .

When the pressure value on the W side of the bidirectional pressure relief valve 20 is greater than the pressure value on the N side, the first valve core 40 is pushed and moved away from the separator 34 , and the first valve core 40 and The second valve core 50 is released from the connected state, and the first pressure relief hole 341 is opened. At this time, the first chamber 331 and the second chamber 332 are connected to the first pressure relief hole 341 and It communicates through the second pressure relief hole 60, so that the pressures of the W side and the N side gradually reach equilibrium. When the first valve core 40 opens the first pressure relief hole 341 , the W side gas is released from the notch 100 of the end cover 70 , the semipermeable membrane 80 , the second chamber 332 , and the second It may flow to the N side through the through hole 50a, the first pressure relief hole 341, the second pressure relief hole 60, and the first chamber 331. When the pressure value on the N side of the bidirectional pressure relief valve 20 is greater than the pressure value on the W side, the second valve core 50 is pushed and moved away from the separator 34 , and the first valve core 40 and The second valve core 50 is released from the connected state to open the second pressure relief hole 60 . At this time, the first chamber 331 and the second chamber 332 are connected to the first pressure relief hole 341 and It communicates through the second pressure relief hole, so that the pressures of the W side and the N side gradually reach equilibrium. When the second valve core 50 opens the second pressure relief hole 60 , the N-side gas flows into the first chamber 331 , the second pressure relief hole 60 , the first pressure relief hole 341 , It may flow to the W side through the second chamber 332 , the second through hole 50a , the semipermeable membrane 80 , and the notch 100 of the end cover 70 ′.

In some other embodiments, the first valve body 42 includes a first valve plate 421 and a first sealing pad 422 . The second valve core 50 has an integrally molded structure.

In some other embodiments, as shown in FIG. 12 , the bidirectional pressure relief valve 20 is connected to the housing 11 of the cell. Optionally, the bidirectional pressure relief valve 20 is detachably connected to the housing 11 . For example, the valve seat 30 and the housing 11 are screwed or adhered. The cell includes an annular sealing member. The annular sealing member is installed over the outside of the valve seat 30 . The annular sealing member is configured to seal the valve seat 30 and the housing 11, thereby reducing the inflow of external dust or water vapor into the battery through the gap between the valve seat 30 and the housing 11, and The seal between the seat 30 and the housing 11 is invalidated, so that the inside of the battery and the external environment communicate with each other, and thus the possibility that the bidirectional pressure relief valve 20 is invalid can be reduced. Optionally, the material of the annular sealing member may be rubber or silicone gel.

In some other embodiments, the end cover 70' of the bidirectional pressure relief valve 20 has a receiving groove 70'b. A part of the annular sealing member is installed in the receiving groove 70'b. The end cover 70' and the housing 11 jointly compress the annular sealing member. The end cover 70' forms a position limitation for the annular sealing member, and reduces the possibility that the seal is invalid due to the misalignment of the annular sealing member.

The bidirectional pressure relief valve 20 of the embodiment of the present application is provided in both directions through the first valve core 40 and the second valve core 50 installed along the axial direction (X) of the channel 33 of the valve seat 30 . can realize the openness of The installation method along the axial direction (X) of the first valve core 40 and the second valve core 50 makes the structure of the bidirectional pressure relief valve 20 compact. After the bidirectional pressure relief valve 20 of the embodiment of the present application is applied to the cell, the bidirectional pressure relief valve 20 maintains the equilibrium of the cell internal pressure and the external pressure, and structural damage on the sealing surface of the battery outer housing 11 . It is possible to reduce the possibility that the sealing due to the occurrence of is improved

Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and equivalents may be substituted for parts thereof without departing from the scope of the present application. In particular, as long as there is no structural conflict, the respective technical features mentioned in each embodiment may be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

1. vehicle; 1a. motor; 1b. controller;
10. Battery; 11. Housing; 111. Upper housing; 112. lower housing; 12. Annular sealing member;
20. Two-way pressure relief valve;
30. valve seat;
31. first end;
32. second end;
33. Channel; 331. first chamber; 332. second chamber;
34. Separator; 34a. a first area; 34b. a second area; 341. first pressure relief hole;
40. a first valve core; 40a. a first through hole; 41. A first elastic member; 42. The first valve body; 421. first valve plate; 421a. first groove; 422. A first sealing pad;
50. a second valve core; 50a. a second through hole; 50b. projection part; 51. a second elastic member; 52. a second valve body; 521. second valve plate; 521a. second groove; 522. a second sealing pad;
60. second pressure relief hole;
70. End cover; 70a. through hole;
70'. end cover; 70'a. through hole; 70'b. receiving home;
80. semi-permeable membrane;
90. Protective cover;
100. Notch;
X. Axial.

Claims (18)

A two-way pressure relief valve comprising:
a valve seat, a first valve core, and a second valve core;
The valve seat has opposing first and second ends, a channel and a separator, the channel passing through the first end and the second end, the separator having a first pressure relief hole installed therein; , the separator is installed on the inner wall of the channel, and in the axial direction of the channel, the separator divides the channel into a first chamber and a second chamber;
at least a portion of the first valve core is located in the first chamber and is configured to open or close the first pressure relief hole to communicate or block the first chamber and the second chamber;
At least a portion of the second valve core is located in the second chamber and is configured to open or close the second pressure relief hole to communicate or block the first chamber and the second chamber, wherein the first chamber and the second chamber are closed. 2 The pressure relief hole is installed in the separator or the first valve core,
A two-way pressure relief valve, characterized in that. According to claim 1,
The separator has a first area and a second area, the first pressure relief hole is provided in the first area, and the second pressure relief hole is provided in the second area of the separator
A two-way pressure relief valve, characterized in that. 3. The method of claim 2,
The first region is installed while surrounding the second region, or along a radial direction of the channel, the first region is located on one side of the second region
A two-way pressure relief valve, characterized in that. 4. The method of claim 2 or 3,
A first through-hole is provided in the first valve core, the first through-hole is configured to communicate with the first chamber and the second pressure relief hole, and/or
A second through hole is provided in the second valve core, and the second through hole is configured to communicate the second chamber and the first pressure relief hole.
A two-way pressure relief valve, characterized in that. According to claim 1,
The second pressure relief hole is provided in the first valve core and corresponds to a position of the first pressure relief hole, and a protrusion is provided in the second valve core, and at least a part of the protrusion is in the first pressure relief hole. accommodated and configured to contact or separate from the first valve core to close or open the second pressure relief hole
A two-way pressure relief valve, characterized in that. 6. The method of claim 5,
A second through hole is provided in the second valve core, and the second through hole is configured to communicate the second chamber and the first pressure relief hole.
A two-way pressure relief valve, characterized in that. 7. The method according to any one of claims 1 to 6,
along the axial direction of the channel, the orthographic projection of the first valve core covers the first pressure relief hole, and the orthographic projection of the second valve core covers the second pressure relief hole
A two-way pressure relief valve, characterized in that. 8. The method according to any one of claims 1 to 7,
The first valve core includes a first elastic member and a first valve body, the first elastic member is in contact with the first valve body to pressurize, and the first valve body opens the first pressure relief hole or configured to close
A two-way pressure relief valve, characterized in that. 9. The method of claim 8,
The first valve body includes a first valve plate and a first sealing pad, and at least a portion of the first valve plate is positioned between the first elastic member and the first sealing pad, and the first valve body includes: opening or closing the first pressure relief hole through the first sealing pad
A two-way pressure relief valve, characterized in that. 10. The method of claim 9,
The first valve plate has a first groove on a surface away from the first elastic member, and at least a portion of the first sealing pad is accommodated in the first groove.
A two-way pressure relief valve, characterized in that. 11. The method according to any one of claims 1 to 10,
The second valve core includes a second elastic member and a second valve body, the second elastic member contacts and pressurizes the second valve body, and the second valve body opens the second pressure relief hole. or configured to close
A two-way pressure relief valve, characterized in that. 12. The method of claim 11,
The second valve body includes a second valve plate and a second sealing pad, and at least a portion of the second valve plate is positioned between the second elastic member and the second sealing pad, and the second valve body includes: opening or closing the second pressure relief hole through the second sealing pad
A two-way pressure relief valve, characterized in that. 13. The method of claim 12,
A surface of the second valve plate away from the second elastic member has a second groove, and at least a portion of the second sealing pad is accommodated in the second groove.
A two-way pressure relief valve, characterized in that. 14. The method according to any one of claims 1 to 13,
The bidirectional pressure relief valve further includes an end cover having a through hole, the end cover is installed at the first end, the through hole communicates with the first chamber, and the end cover is the first valve core is limited in the first chamber, and/or the end cover is installed at the second end, the through hole communicates with the second chamber, and the end cover connects the second valve core to the second chamber. limited within
A two-way pressure relief valve, characterized in that. 15. The method of claim 14,
The bidirectional pressure relief valve further includes a semi-permeable membrane and a protective cover, the semi-permeable membrane being located in the through hole and covering the through hole, the protective cover being connected to the end cover and covering the opening of the through hole, Protective cover and semi-permeable membrane are installed spaced apart.
A two-way pressure relief valve, characterized in that. in the battery,
A housing, a battery module, and a bidirectional pressure relief valve according to any one of claims 1 to 15;
The housing has an accommodation space,
The battery module is accommodated in the receiving space;
The bidirectional pressure relief valve is installed in the housing, and the bidirectional pressure relief valve is configured to maintain a pressure balance in the receiving space so that the receiving space maintains a preset pressure value.
A battery, characterized in that. 17. The method of claim 16,
The battery further includes an annular sealing member, the annular sealing member is installed over the outside of the valve seat, the annular sealing member is configured to seal the valve seat and the housing
A battery, characterized in that. An electrical device comprising:
18. An electrical device comprising a cell according to claim 16 or 17.

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